scholarly journals Impacts of nest predators and weather on reproductive success and population limitation in a long‐distance migratory songbird

2015 ◽  
Vol 46 (6) ◽  
pp. 559-569 ◽  
Author(s):  
Thomas W. Sherry ◽  
Scott Wilson ◽  
Sarah Hunter ◽  
Richard T. Holmes
Keyword(s):  
Reproductive Success ◽  
Long Distance ◽  
Population Limitation ◽  
Migratory Songbird ◽  
Nest Predators

scholarly journals Temporal changes in reproductive success and optimal breeding decisions in a long-distance migratory bird

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Cynthia Reséndiz-Infante ◽  
Gilles Gauthier
Keyword(s):  
Reproductive Success ◽  
Clutch Size ◽  
Environmental Changes ◽  
Migratory Bird ◽  
Laying Date ◽  
Negative Consequences ◽  
Breeding Phenology ◽  
Additional Time ◽  
Long Distance ◽  
Seasonal Decline

AbstractMany avian migrants have not adjusted breeding phenology to climate warming resulting in negative consequences for their offspring. We studied seasonal changes in reproductive success of the greater snow goose (Anser caerulescens atlantica), a long-distance migrant. As the climate warms and plant phenology advances, the mismatch between the timing of gosling hatch and peak nutritive quality of plants will increase. We predicted that optimal laying date yielding highest reproductive success occurred earlier over time and that the seasonal decline in reproductive success increased. Over 25 years, reproductive success of early breeders increased by 42%, producing a steeper seasonal decline in reproductive success. The difference between the laying date producing highest reproductive success and the median laying date of the population increased, which suggests an increase in the selection pressure for that trait. Observed clutch size was lower than clutch size yielding the highest reproductive success for most laying dates. However, at the individual level, clutch size could still be optimal if the additional time required to acquire nutrients to lay extra eggs is compensated by a reduction in reproductive success due to a delayed laying date. Nonetheless, breeding phenology may not respond sufficiently to meet future environmental changes induced by warming temperatures.

Range‐wide populations of a long‐distance migratory songbird converge during stopover in the tropics

2019 ◽  
Vol 89 (2) ◽  
pp. e01349 ◽  
Author(s):  
Camila Gómez ◽  
Sara L. Guerrero ◽  
Alyssa M. FitzGerald ◽  
Nicholas J. Bayly ◽  
Keith A. Hobson ◽  
...  
Keyword(s):  
Long Distance ◽  
Migratory Songbird ◽  
The Tropics

scholarly journals Bergmann's rule is followed at multiple stages of postembryonic development in a long‐distance migratory songbird

2020 ◽  
Vol 10 (19) ◽  
pp. 10672-10686
Author(s):  
Joseph Youtz ◽  
Kelly D. Miller ◽  
Emerson K. Bowers ◽  
Samantha L. Rogers ◽  
Lesley P. Bulluck ◽  
...  
Keyword(s):  
Postembryonic Development ◽  
Bergmann’S Rule ◽  
Bergmann's Rule ◽  
Long Distance ◽  
Migratory Songbird ◽  
Multiple Stages

scholarly journals The influence of morphological variation on migration performance in a trans-hemispheric migratory songbird

2015 ◽  
Vol 2 (1) ◽  
pp. 86-95 ◽  
Author(s):  
Lawrence Lam ◽  
Emily A. McKinnon ◽  
James D. Ray ◽  
Myrna Pearman ◽  
Glen T. Hvenegaard ◽  
...  
Keyword(s):  
Body Size ◽  
Morphological Traits ◽  
Light Level ◽  
Spring Migration ◽  
Future Research ◽  
Long Distance ◽  
Intrinsic Factors ◽  
Migratory Songbirds ◽  
Migratory Songbird ◽  
Direct Tracking

AbstractFor long-distance migratory songbirds, morphological traits such as longer wings and a smaller body size are predicted to increase migration efficiency. Due to previous limitations in our ability to track the long-distance journeys of small-bodied birds, the relationship between morphology and start-to-finish migration performance has never been fully tested in free-living songbirds. Using direct-tracking data obtained from light-level geolocators, we examined the effects of morphological factors (wing and body size) on spring and fall migration performance (flight speed, duration of stopovers, total stopovers taken) of a widely distributed, trans-hemispheric migratory songbird, the purple martin (Progne subis) (n = 120). We found that smaller-bodied birds spent fewer days at stopovers along fall migration, but larger-bodied birds spent fewer days at stopover and took fewer stopovers during spring migration. More of the variation in fall migration performance was explained by morphology, as compared to spring migration, possibly indicating a larger influence of environmental conditions on spring performance. Overall, our results partially support long-standing and previously untested predictions regarding the influence of intrinsic factors on migration performance. Future research should examine the influence of environmental variation on migration performance as well as additional morphological traits that may contribute to migration performance.

scholarly journals Extra-pair paternity in a long-distance migratory songbird beyond neighbors’ borders and across male age classes

2018 ◽  
Vol 96 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Leonard R. Reitsma ◽  
James A. Jukosky ◽  
Alexi J. Kimiatek ◽  
Marrisa L. Goodnow ◽  
Michael T. Hallworth
Keyword(s):  
Bird Species ◽  
Breeding Population ◽  
Age Classes ◽  
Long Distance ◽  
Extra Pair Paternity ◽  
Socially Monogamous ◽  
Migratory Songbird ◽  
Potential Strategy ◽  
Underlying Mechanisms ◽  
Demographic Patterns

Roughly 90% of socially monogamous bird species exhibit some degree of extra-pair paternity (EPP), although the extent and the underlying mechanisms vary among species. We analyzed spatial and demographic patterns of EPP over a 6 year period (2005–2010) as part of a long-term population study of Canada Warblers (Cardellina canadensis (L., 1766)). We identified 12 microsatellite loci used to assess paternity for 185 nestlings from 61 nests. Extra-pair young (EPY) accounted for 41.6% of all nestlings and 57.4% of nests contained at least one EPY. Fewer than half of EPY were sired by males who shared territorial boundaries, and some males sired young in nests 1 km from their territory. The age of social males did not differ from males who cuckolded them. The majority (83%) of EPY were sired by males in older age classes (2+ years old), while <17% were sired by 1 year olds. Of the young sired by older males, 58.5% were sired by males 3–7 years old. Males that sired more EPY sired fewer within-pair young (WPY); those without EPY sired more WPY suggesting a possible fitness trade-off between these two strategies. Our findings suggest multiple age-based strategies within a single breeding population, as well as potential strategy shifts to maximize lifetime fitness as they age.

Annual GPS tracking reveals unexpected wintering area in a long-distance migratory songbird

2018 ◽  
Vol 160 (1) ◽  
pp. 265-270 ◽  
Author(s):  
Lykke Pedersen ◽  
Kasper Thorup ◽  
Anders P. Tøttrup
Keyword(s):  
Gps Tracking ◽  
Long Distance ◽  
Wintering Area ◽  
Migratory Songbird

scholarly journals Oil collecting bees and Byrsonima cydoniifolia A. Juss. (Malpighiaceae) interactions: the prevalence of long-distance cross pollination driving reproductive success

2014 ◽  
Vol 86 (1) ◽  
pp. 347-358 ◽  
Author(s):  
MORGANA S. SAZAN ◽  
ANTONIO DIEGO M. BEZERRA ◽  
BRENO M. FREITAS
Keyword(s):  
Gene Flow ◽  
Reproductive Success ◽  
Reproductive System ◽  
Host Plants ◽  
Floral Biology ◽  
Self Incompatibility ◽  
Long Distance ◽  
Pollination Service ◽  
Cross Pollination

Oil-collecting bees are the natural pollinators of oil-flower plants, but little is known about the pollination process and the effectiveness of their pollination service to the reproductive success of their host plants. In species of Byrsonima the reproductive system have been described as auto-compatible or self-incompatible. We studied the reproductive system of Byrsonima cydoniifolia, the fructification by means of short, medium and long-distance cross pollinations, the morphology and floral biology and the pollination interactions with species of oil-collecting bees. By means of controlled pollinations we found self-incompatibility caused by abortion of most self-pollinated flowers and demonstrated that the prevailing cross pollination ensuring the reproductive success of B. cydoniifolia is the long-distance cross pollination and Centridini bees; Epicharis nigrita, particularly, are the pollinators promoting the gene flow between genetically distinct populations.

Invasion of an exotic forb impacts reproductive success and site fidelity of a migratory songbird

Oecologia ◽  
2006 ◽  
Vol 149 (2) ◽  
pp. 340-351 ◽  
Author(s):  
Yvette Katina Ortega ◽  
Kevin Scot McKelvey ◽  
Diana Lee Six
Keyword(s):  
Reproductive Success ◽  
Site Fidelity ◽  
Migratory Songbird

scholarly journals Non-breeding season events influence sexual selection in a long-distance migratory bird

2009 ◽  
Vol 276 (1662) ◽  
pp. 1619-1626 ◽  
Author(s):  
Matthew W Reudink ◽  
Peter P Marra ◽  
T. Kurt Kyser ◽  
Peter T Boag ◽  
Kathryn M Langin ◽  
...  
Keyword(s):  
Sexual Selection ◽  
Reproductive Success ◽  
Breeding Season ◽  
Poor Quality ◽  
Migratory Bird ◽  
Lower Probability ◽  
Mixed Mating ◽  
Long Distance ◽  
High Quality ◽  
American Redstarts

The study of sexual selection has traditionally focused on events and behaviours immediately surrounding copulation. In this study, we examine whether carry-over effects from the non-breeding season can influence the process of sexual selection in a long-distance migratory bird, the American redstart ( Setophaga ruticilla ). Previous work on American redstarts demonstrated that overwintering in a high-quality habitat influences spring departure dates from the wintering grounds, advances arrival dates on the breeding grounds and increases apparent reproductive success. We show that the mixed-mating strategy of American redstarts compounds the benefits of overwintering in high-quality winter habitats. Males arriving to breed in Canada from high-quality winter habitats arrive earlier than males from poor-quality habitats, resulting in a lower probability of paternity loss, a higher probability of achieving polygyny and ultimately higher realized reproductive success. Such results suggest that the process of sexual selection may be influenced by events interacting throughout the annual cycle.

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